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support request - PCM1803A

My question concerns the PCM1803a :
The delta-sigma modulator is 1-bit or n-bit ?
What is the order of the modulator ?
Can we see some spikes (idle tone) in the noise floor ?
For the PCM1802, I find this in the datasheet :
The high-order delta-sigma modulation randomizes the modulator outputs and reduces the idle tone level.
The delta-sigma modulator
The order of the modulator
Idle tone
reduces level by The high-order delta-sigma modulation
Best regards,
Christophe Courté
Ingénieur électronique